JP2002309544A - Hanger for laying sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance workability and safety in laying a sheet by providing a means for replacing a sheet roll and a means for forcibly driving a rotating shaft which supports the sheet roll. SOLUTION: This hanger 4 has support units 24 and 25 provided at a body frame 23 having a hanging fitting 20 on its upper surface and pedestals 21 and 22 at both ends thereof, with the support units having a pair of rotating shafts 35 for supporting the sheet roll 3 formed by winding a sandproof sheet 2 on a shaft member 1. Two pairs of cylinders 40 and 41 for locking and hoisting both ends of a hanging member hooked to either the sheet roll 3 or its shaft member 1 are fixed to the body frame 23, and one 24 of the support units is provided with a drive 50 for forcibly driving the rotating shaft 35 by use of a hydraulic motor 52 as a drive source.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hanger for a sheet laying apparatus for automatically laying underwater laying sheets such as a sandproof sheet, a water blocking sheet, a seeding sheet and the like.

[0002]

2. Description of the Related Art For example, a sheet laying apparatus for laying a sandproof sheet for preventing earth and sand from leaking through a foundation such as a reclaimed seawall or a breakwater is disclosed in JP-A-9-165732. I have. This apparatus comprises a long main body frame having a hanging metal fitting on an upper surface, a hanging tool provided with two support units having a rotating shaft for detachably supporting a sheet roll having a sandproof sheet wound around a shaft member, Based on position information obtained by surveying means including a GPS and an ultrasonic surveying system, the hanging tool is moved by a crane operation from a work boat, and a sandproof sheet is fed out from the sheet roll. This has the advantage that the sandproof sheet can be reliably and easily laid on the sheet laying surface having a large water depth.

By the way, according to the sheet laying device described in the above publication, replacement of a sheet roll with respect to the hanger is performed.
The sheet roll is placed on a pair of roll supports mounted on the work boat, and the lifting tool is moved closer to the sheet roll on the roll support by crane operation, and the end flange of the shaft member of the sheet roll and the support unit are mounted. It is performed by a method of bolting together with the end flange of the rotating shaft (see the publications [0025] and [0026], etc.). However, according to such an exchanging method, the work of the work boat itself is added to the swing of the hanger by the crane operation, so that the work of aligning the hanger with the sheet roll becomes considerably difficult,
There were also many problems in terms of safety. Therefore, recently, pillars are provided at both ends of the main frame constituting the hanging tool, and after the hanging tool is fixed on the work boat by the pillars,
The sheet roll is wound up by a chain block attached to the main body frame, and is positioned with respect to a fixed rotation axis.

[0004]

However, according to the use of the above-mentioned chain block, if the chain block is fixed to the body frame of the hanging tool and fixed as equipment, rusting occurs early in subsea work, so that the sheet is not used. There is a restriction that the chain block must be attached to the main body frame of the hanging tool every time the roll is replaced. In this case, the attachment of the chain block to the main body frame is not only a considerably complicated work but also a high-place work, and the role of the above-mentioned pillar provided for improving the workability and safety of sheet roll replacement is greatly reduced. There was a problem of being wasted.

On the other hand, when laying the sheet, the end of the sand-proof sheet is drawn in advance from the sheet roll, and the drawn-out end of the sand-proof sheet is fixed to the upper fixed portion of the sheet laying surface (the top end of the embankment or rubble mound). Must be fixed to
According to the use of the hanging tool having the above-mentioned pillar, the pillar does not allow the hanging tool to approach the fixing portion so much that the end of the sandproof sheet is considerably long (5 to 6).
m) There was a restriction that it had to be withdrawn. However, since the conventional hanging tool does not have a special means for forcibly rotating the rotation axis, that is, the sheet roll, it is necessary to draw out the end of the sandproof sheet in advance on the work boat, as described above. If the drawer end is longer, while moving the hanging tool to the fixed part by crane operation,
The drawer end of the sand-proof sheet was greatly affected by the wind, and it became extremely difficult to fix it.
There was also a problem that the safety was significantly impaired and the work was often interrupted.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems. A first object of the present invention is to make it possible to equip a means for replacing a sheet roll as a fixed facility, and It is an object of the present invention to provide a sheet laying hanger which contributes to improvement of workability and safety of roll exchange. The second problem is that a means for forcibly rotating the rotating shaft supporting the sheet roll is provided, thereby contributing to improvement in workability and safety of fixing the end portion of the underwater laid sheet. An object of the present invention is to provide a hanger for laying a sheet. A third object of the present invention is to provide a seat laying hanger which simultaneously solves the first and second problems and is excellent in workability and safety as a whole.

[0007]

A hanging roll according to the present invention is a sheet roll in which an underwater laying sheet is wound around a shaft member on a long body frame having a hanging metal fitting on an upper surface and a pillar at both ends. The basic configuration is to provide two support units each having a rotating shaft for detachably supporting the.
According to a first aspect of the present invention, there is provided a hanger having the above-described basic configuration, wherein a pair of the main body frames is provided with a pair of ends for locking both end portions of the sheet roll or the hanging member hung on the shaft member. Characterized in that at least two pairs of the cylinders are suspended in the longitudinal direction of the main body frame. In the sheet laying hanger configured as described above, a cylinder having excellent corrosion resistance is used for exchanging the sheet roll, so that the hanger can be equipped as a fixing facility. According to a second aspect of the present invention for solving the second problem, in the hanging device having the above-mentioned basic configuration, one of the two support units is provided with a hydraulic motor as a drive source and a rotation in the support unit. It is characterized in that a driving means for driving the shaft to rotate is provided. In the sheet laying hanger thus configured, the sandproof sheet can be arbitrarily fed or rewound by rotating the rotation shaft by the driving means. Therefore, the upper position of the fixing portion for fixing the end of the underwater laying sheet. , The end of the underwater laying sheet can be fixed and the end of the underwater laying sheet need not be pulled out in advance on the work boat. Further, a third invention for solving the third problem is a hanging tool having the above-mentioned basic configuration, wherein both ends of the hanging member hanging on the sheet roll or the shaft member are locked to the main body frame. At least two pairs of a pair of cylinders are suspended in the longitudinal direction of the main body frame, and one of the two support units is driven by a hydraulic motor as a drive source to rotate a rotation shaft in the support unit. A driving means is provided. In the sheet laying hanger configured as described above, the combination of the first and second aspects described above not only improves the workability and safety of sheet roll replacement, but also fixes the end of the underwater laid sheet. Workability and safety are also improved.

[0008]

Embodiments of the present invention will be described below with reference to the accompanying drawings. The overall configuration of the sheet laying device to which the present invention is applied is substantially the same as that described in the above-mentioned Japanese Patent Application Laid-Open No. 9-165732, and as shown in FIG. 2 according to the present invention, which rotatably supports the sheet roll 3 around which the sheet 2 is wound.
And a work boat 7 equipped with a crane 6 for suspending and supporting the hanging tool 4 via a wire 5, four satellites 8, a GPS mobile station 9 on the work boat 7, and a GPS fixed station 10 on land. It comprises a global positioning system (GPS) and an ultrasonic surveying system including two ultrasonic transmitters 11 provided on the hanging tool 4 and three ultrasonic receivers 12 provided on the work boat 7. In FIG. 5, 13 is a GP.
S for receiving antenna, 14 for radio transmitting antenna, 1
Reference numeral 5 denotes a wireless receiving antenna.

The above-described seat laying device calculates the current position of the work boat 7 based on the GPS signal captured by the GPS mobile station 9 and also calculates the GP transmitted from the GPS fixed station 10.
An arithmetic processing unit (not shown) having a function of correcting the current position of the work boat 7 based on the S signal is provided. This arithmetic processing device also has a function of taking in the ultrasonic signal transmitted from the ultrasonic transmitter 11 via the ultrasonic receiver 12 and calculating the relative distance between the work boat 7 and the hanging tool 4. Therefore, the position (absolute position) of the hanging member 4 can be grasped from the calculation result of the calculation processing device. Note that this arithmetic processing device is disclosed in
Since it is described in detail in US Pat. No. 5,732,732, only a brief description thereof will be given here. The sheet laying device also includes the hanging tool 4 determined by the arithmetic processing device.
Is provided with a monitor that wraps the absolute position of the hanging member 4 in advance on the cross-sectional shape of the sheet laying surface and displays the position in real time. Therefore, while tracking the position of the hanging member 4 on the monitor of this display device, 4 can be arbitrarily moved along the sheet laying surface.

As shown in FIGS. 1 to 4, the hanging tool 4 according to the present invention has a pair of hanging tools 20 on the upper surface of which the hanging wire 5 of the crane 6 is hung.
And a long main body frame 23 having a plurality of shaft members 22 disposed at both ends of the main body frame 23 at positions adjacent to the insides of the two pillars 21 and 22.
And support units 24 and 25 for rotatably supporting.

The main body frame 23 of the hanging member 4 is made of H-shaped steel, and is arranged in a vertical position so that its web stands upright. A plurality of longitudinal portions are reinforced by reinforcing plates 26. ing. In addition, each pillar 21, 2
2, a fixed plate 27 fixed to both ends of the main body frame 23, a pair of left and right legs 28 extending from the fixed plate 27 in the opening direction, and a pair of left and right Reinforcing beams 2 bridged between the leg pieces 28
9, the whole of which has a triangular shape.

On the other hand, each support unit 24, 25
As shown in FIG. 3, the support frame 30 is fixed to the lower surface of the main body frame 23 so as to extend in a direction perpendicular to the lower surface.
And a pair of left and right columns 31 vertically lowered from the lower surface of the support frame 30, and two plates arranged between the pair of columns 31 and connected to the columns 31 via joints 32. And a rotating shaft 35 rotatably supported by a plurality of rollers 34 arranged concentrically on the roller frame 33. Each rotating shaft 3
Reference numeral 5 indicates that the sheet roll 3 can be detachably supported by aligning the end flange 1a of the shaft member 1 of the sheet roll 3 with a flange 35a provided at one end thereof and bolting the same (FIG. 1). ).

Two pairs of cylinders 40 and 41 are suspended from the body frame 23 of the hanging member 4 at a slightly shorter interval than the shaft member 1 of the sheet roll 3. Each pair of cylinders 40,
41 is a main frame 23 as shown in FIG.
A rod 43 is attached to both ends of a bracket 42 fixedly orthogonal to the upper surface of the upper surface of the bracket 42 with a mounting pin 44 so that the rod 43 faces downward. Thus, each mounting pin 44 extends in parallel with the axis of the rotation shaft 35, whereby the pair of cylinders 40 and 41 are arranged on both sides of the main body frame 23 so as to be able to relatively rotate. Each pair of cylinders 40 and 41 serves to suspend and support the sheet roll 3 or its shaft member 1, and is wound around the sheet roll 3 or its shaft member 1 at the tip of each rod 44. A locking member 46 for detachably locking a suspension belt (a suspension member: a chain or a wire) 45 may be fixedly provided. More specifically, a bolt insertion hole (not shown) is formed at the distal end of the locking member 46, and the eyes 45 a at both ends of the suspension belt 45 are connected to each other by using bolts 47 passed through the bolt insertion holes. U passed
Both ends of the character fitting 48 are connected. A switching valve 49 for supplying and discharging oil to and from the pair of cylinders 40 and 41 is attached to one pillar 22 of the hanging tool 4 (FIG. 1). Is connected to a hydraulic pressure source.

On the other hand, as shown in FIG.
Is provided with a driving device (driving means) 50 for driving the rotation shaft 35 to rotate. This driving device 50 is similar to that shown in FIG.
And a hydraulic motor 52 provided on a bracket 51 fixed to the lower surface of the roller frame 33 constituting the support unit 24, as shown in FIG.
A large sprocket 53 fixed to the end of the rotating shaft 35 protruding toward the pillar 21, a small sprocket 54 fixed to the output shaft end of the hydraulic motor 52, and both sprockets 5.
And a chain 55 wrapped around 3 and 54. The hydraulic motor 52 can rotate in any direction of left or right, and its rotation is controlled by both sprockets 53,
Transmitted to the rotating shaft 35 via the chain 54 and the chain 55,
The rotation shaft 35 is also arbitrarily rotated left or right.
It should be noted that the drive device 50 may employ a belt drive system, a gear drive system, or the like instead of the above-described chain drive system.

Here, at the end of the winding of the sand preventive sheet 2 constituting the sheet roll 3, the end of the sand preventive sheet 2 is fixed to a fixed portion (the top end of the embankment or rubble mound) on the upper side of the sheet laying surface. A number of cords 16 (FIG. 1) are attached. In addition, the hanging tool 4 includes an underwater camera,
Ultrasonic sounder that measures the distance between the
Alternatively, a rotation amount detector for detecting the rotation amount of the rotating shaft 35 is provided, but these are not shown.

Hereinafter, a sheet laying method using the sheet laying apparatus configured as described above will be described. When attaching sheets, a plurality of sheet rolls 3 are prepared on the work boat 7 or a separately prepared barge, and these sheet rolls 3 are placed and fixed on a pedestal (not shown) having a predetermined height. And
After the work boat 7 is towed to the construction site and moored, the hanging tool 4 is lifted by the crane 6, and the hanging tool 4 is operated so that the main body frame 23 is positioned above one sheet roll 3 on the pedestal. After being fixed on the boat 7 or the barge, a hydraulic source (not shown) is connected to the switching valve 48. Next, the suspension belt 45 is wrapped around the sheet roll 3, and the eyes 45 a at both ends are locked to the locking members 46 of the pair of cylinders 40 and 41 using the U-shaped bracket 48 and the bolt 47. At this time, the pair of cylinders 40 and 41 extend the respective rods 43 so that the locking operation can be performed directly from the floor, and a dangerous high-place operation is not required. Next, a pair of cylinders 40, 41
Of the shaft member 1 is aligned with the flange 35a of the rotating shaft 35 in each of the support units 24 and 25, and the two flanges 1a and 35a And bolt.

When the attachment of the sheet roll 3 to the hanging member 4 is completed, the pair of cylinders 40, 41
The rods 43 are extended, the bolts 47 are loosened, and the suspension belt 45 is removed from the locking member 46 at the tip of each rod 43. Next, the rods 43 of the pair of cylinders 40 and 41 are shortened to the shortened ends. At this stage, the switching valve 49 is disconnected from the hydraulic pressure source, and the crane 6 is operated to move the hanging member 4 to the fixing portion on the upper side of the seat laying surface. To the vicinity of. Thereafter, the hydraulic motor 52 in the driving device 50 is operated, the rotation is transmitted to one of the rotation shafts 35, the sheet roll 3 is rotated, and the sandproof sheet 2 is fed out from one end by a required length (5 to 6 m). . Thereafter, the operator grasps the cord-like body 16 hanging from the edge of the sandproof sheet 2 by hand, and binds the string-like body 16 to a locking bar pre-installed on the fixing portion. The fixing operation of the part is completed. That is, in the present embodiment, the rotation shaft 35 near the fixed portion is used.
Is forcedly rotated to draw out the end of the sandproof sheet 2 for a required length, so that the wind is greatly affected as in the case where the end of the sandproof sheet 2 is drawn out in advance on the work boat 7 and the hanging tool 4 is moved. Thus, the end of the sandproof sheet 2 can be fixed efficiently and safely.

After that, the GPS 8 and the ultrasonic oscillator 1
The position of the hanging tool 4 is determined by a positioning means including the ultrasonic receiver 1 and the ultrasonic receiver 12, and while the position of the hanging tool 4 is tracked on the monitor of the display, the hanging tool 4 is fixed along the sheet laying surface. , And at the same time, the hydraulic motor 52 of the driving device 50 is operated, and the rotation of the rotating shaft 35 rotates the sheet roll 3 at a constant speed. Thereby, the sandproof sheet 2 is gradually fed out from the sheet roll 3 and is gradually laid on the sheet laying surface. At this time, the laying state is monitored by an underwater camera (not shown) provided on the hanging tool 4,
The distance between the hanger 4 and the sheet laying surface is confirmed by an ultrasonic sounding device (not shown) provided on the hanger 4, and if there is any abnormality, the operation is immediately stopped.

When the entire amount of the sandproof sheet 2 of the sheet roll 3 has been laid in this way, the hanging tool 4 is pulled up to the sea,
The hanging tool 4 is fixed on the work boat 7 or the barge. First, a hydraulic pressure source (not shown) is connected to the switching valve 49, and thereafter,
The rods 43 of the pair of cylinders 40 and 41 are extended, and both ends of the suspension belt 45 wrapped around the sheet roll 3 are locked by the locking members 46 at the ends of the rods 43. Next, each rod 43 of the pair of cylinders 40, 41
The operation of the pair of cylinders 40 and 41 is stopped at the stage where the suspension belt 45 abuts on the empty shaft member 1 from below and is tightened, and in this state, the flange 35a of each rotary shaft 35 is stopped.
The bolt connecting the shaft member 1 to the end flange 1 a is removed, and the shaft member 1 is separated from the rotating shaft 35. After the separation is completed, each rod 4 of the pair of cylinders 40, 41
3 is extended to the extension end, and the shaft member 1 is placed on the pedestal.
Subsequently, the bolt 47 at the end of each rod 43 is loosened to release the locking member 4.
6, the hanging tool 4 is moved to the position where the new sheet roll 3 is placed, or the new sheet roll 3 is carried into the lower side of the hanging tool 4. 4 supports the new sheet roll 3 and lays the next sheet.

It should be noted that in the above embodiment, the hanging member 4
Although two pairs of cylinders 40 and 41 are mounted on the main body frame 23 and a driving device 50 for rotating and driving the rotation shaft 35 is provided on one of the support units 24, the present invention provides the cylinders 40 and 41 and the driving device 50. It is also possible to adopt a configuration in which only one of the above is equipped. However, when only the cylinders 40 and 41 are provided, it is desirable to provide a braking means for braking the rotation of the rotating shaft 35.

[0021]

As described above in detail, according to the first aspect, since the cylinder having excellent corrosion resistance is provided as a fixed facility used for exchanging the sheet roll, the installation and removal of the facility can be performed. This is unnecessary, and workability and safety of sheet roll replacement are significantly improved. Also, the second
According to the invention, since the driving means for forcibly driving the rotating shaft is provided, the end of the underwater laid sheet can be extended by a required amount in the vicinity of the fixed portion, and the influence of the wind is greatly increased. The workability and safety of fixing the end portion of the underwater laying sheet are remarkably improved. Further, since the driving means uses a hydraulic motor as a driving source, its structure is simple and its operation is stably maintained for a long period of time. Furthermore, according to the third invention, since the features of the first and second inventions described above are combined, a sheet laying hanger excellent in workability and safety as a whole can be realized.

[Brief description of the drawings]

FIG. 1 is a side view showing the overall structure of a sheet laying hanger according to the present invention.

FIG. 2 is a front view showing the overall structure of the hanging device.

FIG. 3 is a front view showing a structure of a support unit constituting the hanging device.

FIG. 4 is a front view showing a mounting structure of a cylinder constituting the hanging device.

FIG. 5 is a perspective view schematically showing the overall structure of a sheet laying device to which the hanging device according to the present invention is applied.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Shaft member 2 Sandproof sheet 3 Sheet roll 4 Hanging tool 7 Work boat 20 Hanging tool 21, 22 Pillar 23 Main frame 24, 25 Supporting unit 35 Rotating shaft 40, 41 Cylinder 45 Suspension belt (suspension member) 50 Drive unit (drive) Means) 52 Hydraulic motor

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kenshi Morita 4-1-1 Komyobashi, Chuo-ku, Osaka-shi, Osaka Toyo Construction Co., Ltd. (72) Inventor Masayuki Yahara 3-7 Kandanishikicho, Chiyoda-ku, Tokyo 1 Tomac Co., Ltd. (72) Inventor Shigeki Sugihara 4-1-1 Koraibashi, Chuo-ku, Osaka-shi, Osaka F-term in Toyo Construction Co., Ltd. 2D018 DA03

Claims (3)

[Claims] 1. A long body frame having a hanging bracket on an upper surface and a pillar at both ends has a rotating shaft for detachably supporting a sheet roll having an underwater laid sheet wound on a shaft member. In the hanging device for laying a sheet provided with a support unit, a pair of cylinders for locking both ends of the hanging member hung on the sheet roll or the shaft member thereof in the main body frame, at least in a longitudinal direction of the main body frame. A hanging device for laying a sheet, comprising two pairs mounted. 2. A long body frame having a suspending fitting on the upper surface and a pillar at both ends has a rotating shaft for detachably supporting a sheet roll having an underwater laid sheet wound on a shaft member. In a sheet laying hanger provided with a support unit, one of the two support units is provided with a driving unit that uses a hydraulic motor as a drive source and rotationally drives a rotation shaft in the support unit. Characteristic hanging equipment for sheet laying. 3. A long body frame having a hanging bracket on an upper surface and a pillar at both ends has a rotating shaft for detachably supporting a sheet roll having an underwater laid sheet wound on a shaft member. In the hanging device for laying a sheet provided with a support unit, a pair of cylinders for locking both ends of the hanging member hung on the sheet roll or the shaft member thereof in the main body frame, at least in a longitudinal direction of the main body frame. Characterized in that two pairs are mounted, and one of the two support units is provided with a drive means for rotating a rotary shaft in the support unit by using a hydraulic motor as a drive source. Hanging equipment.